Supply Reel Spaghetti Ball
A couple of times I have suffered the Supply Reel Spaghetti Ball syndrome (see photo) when large excursions of the X-axis cause windings on a full or almost full reel to "overflow" the reel and tangle around the spool holder's horizontal element. I have been using a small C-clamp (colored red in the photo) to constrain the feed path somewhat, but it failed miserably here, as you can see.
I recall seeing (Here? Thingiverse?) a filament guide that clips onto the upper frame element (similar to the dual spool support bracket) that provides a filament entry point very close to the spool edge to keep this from happening, but I cannot now locate it. Does anyone else recall seeing this guide, and can you please provide a link to it. Or do you have other solutions?
That's not the one I remember seeing, but it certainly looks like it will do the job. I'll try it. Thanks for the link.
IIRC, it was round and only slightly larger than 1.75mm filament.
There are a huge number of options out there. I would just pick on and try it. If it does not work for you, just print another. I printed one and I am going try to incorporate it into my spool holder.